The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2012
Filed:
May. 07, 2007
Yasuo Tanaka, Yokohama, JP;
Yutaka Watanabe, Kasumigaura, JP;
Kichio Nakajima, Kasumigaura, JP;
Tomohiko Yasuda, Kashiwa, JP;
Takashi Yagyu, Ushiku, JP;
Yasuo Tanaka, Yokohama, JP;
Yutaka Watanabe, Kasumigaura, JP;
Kichio Nakajima, Kasumigaura, JP;
Tomohiko Yasuda, Kashiwa, JP;
Takashi Yagyu, Ushiku, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
Engine driving characteristics are achieved for driving a hydraulic system during non-traveling and traveling in an electrically driven dump truck. When a shift leveris located at a neutral position, the target revolution speed Nrcorresponding to the operation amount (p) of an accelerator pedalis calculated on the basis of first target revolution speed characteristics (Nr()) which are suitable for driving of a hydraulic pump for working so that an electronic governoris controlled on the basis of this target revolution speed. When the shift leveris located at a forward position, the target revolution speed Nrcorresponding to the operation amount of the accelerator pedalis calculated on the basis of second target revolution speed characteristics (Nr()) which are suitable for driving of electric motorsR,L so that the electronic governoris controlled on the basis of this target revolution speed.